já uso a versão 1.5, gostaria de atualizar para a versão 2, já testei vários tutoriais e sempre acabo empacando na mesma parte alguém poderia me ajudar?
php composer.phar create-project "novosga/novosga:v2.0.0-RC3" ~/novosga
Installing novosga/novosga (v2.0.0-RC3)
- Installing novosga/novosga (v2.0.0-RC3): Loading from cache
Created project in /home/prorad/novosga
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for symfony/framework-bundle v4.0.6 -> satisfiable by symfony/framework-bundle[v4.0.6].
- symfony/framework-bundle v4.0.6 requires ext-xml * -> the requested PHP extension xml is missing from your system.
Problem 2
- Installation request for symfony/security-bundle v4.0.6 -> satisfiable by symfony/security-bundle[v4.0.6].
- symfony/security-bundle v4.0.6 requires ext-xml * -> the requested PHP extension xml is missing from your system.
Problem 3
- Installation request for squizlabs/php_codesniffer 3.2.3 -> satisfiable by squizlabs/php_codesniffer[3.2.3].
- squizlabs/php_codesniffer 3.2.3 requires ext-simplexml * -> the requested PHP extension simplexml is missing from your system.
Problem 4
- Installation request for symfony/debug-bundle v4.0.6 -> satisfiable by symfony/debug-bundle[v4.0.6].
- symfony/debug-bundle v4.0.6 requires ext-xml * -> the requested PHP extension xml is missing from your system.
Problem 5
- symfony/framework-bundle v4.0.6 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- symfony/maker-bundle v1.3.1 requires symfony/framework-bundle ^3.4|^4.0 -> satisfiable by symfony/framework-bundle[v4.0.6].
- Installation request for symfony/maker-bundle v1.3.1 -> satisfiable by symfony/maker-bundle[v1.3.1].
To enable extensions, verify that they are enabled in your .ini files:
- /etc/php/7.2/cli/php.ini
- /etc/php/7.2/cli/conf.d/10-opcache.ini
- /etc/php/7.2/cli/conf.d/10-pdo.ini
- /etc/php/7.2/cli/conf.d/20-calendar.ini
- /etc/php/7.2/cli/conf.d/20-ctype.ini
- /etc/php/7.2/cli/conf.d/20-exif.ini
- /etc/php/7.2/cli/conf.d/20-fileinfo.ini
- /etc/php/7.2/cli/conf.d/20-ftp.ini
- /etc/php/7.2/cli/conf.d/20-gettext.ini
- /etc/php/7.2/cli/conf.d/20-iconv.ini
- /etc/php/7.2/cli/conf.d/20-json.ini
- /etc/php/7.2/cli/conf.d/20-phar.ini
- /etc/php/7.2/cli/conf.d/20-posix.ini
- /etc/php/7.2/cli/conf.d/20-readline.ini
- /etc/php/7.2/cli/conf.d/20-shmop.ini
- /etc/php/7.2/cli/conf.d/20-sockets.ini
- /etc/php/7.2/cli/conf.d/20-sysvmsg.ini
- /etc/php/7.2/cli/conf.d/20-sysvsem.ini
- /etc/php/7.2/cli/conf.d/20-sysvshm.ini
- /etc/php/7.2/cli/conf.d/20-tokenizer.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.